Home / 3,933.59-5,428.38-2,165.20

Finding the Fourth Proportional to 3,933.59, 5,428.38 and 2,165.20

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Solution

The fourth proportional to 3,933.59, 5,428.38 and 2,165.20 is: 2,987.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,933.59 : 5,428.38 = 2,165.20 : x
  2. Step 2: Convert to fraction form
    3,933.59/5,428.38 = 2,165.20/x
  3. Step 3: Cross multiply
    3,933.59x = 5,428.38 × 2,165.20
  4. Step 4: Simplify right side
    3,933.59x = 11,753,522.92
  5. Step 5: Solve for x
    x = 11,753,522.92/3,933.59
  6. Step 6: Final answer
    x = 2,987.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.